International Journal of Engineering and Artificial Intelligence Vol 1 No 1 (2020) 35–68 35 Explore Workplace Wastes, Source of Wastes, and Selecting Appropriate Lean Manufacturing Practices in Thermal Power Plants Muhammad Iqbal Hussain 1, 2 , Malek Khalaf Albzeirat 3, 4 , Rosmaini Ahmad 2 , Islam Dewan 5 , Nadeem Khalid 6 , Nik Noriman Zulkepli 3, 4 1 Mechanical Engineering Technology Department, Faculty of Engineering Technology, University Malaysia Perlis 2 School of Manufacturing Engineering, Universiti Malaysia Perlis, Malaysia 3 Center of Excellence for Sport and engineering Research, University Malaysia Perlis 4 Center of Excellence Geopolymer and Green Technology (CEGeoGTech), Universiti Malaysia Perlis (UniMAP), Kompleks Pengajian Jejawi 2, 02600 Arau, Perlis, Malaysia 5 College of Business, KIMEP university 2 Abay Avenue Almaty, 050010, Kazakhstan 6 Executive education center, Kimep university Corresponding author: malekunimap@gmail.com Received 11 January 2020, Accepted 24 February , Available online 28 February 2020 ABSTRACT Lean manufacturing practices (LMPs) have been developed to eliminate or reduce manufacturing waste and thus improve operational efficiency in manufacturing processes. There is currently no systematic methodology available for selecting appropriate LMPs within a Thermal Power Plants (TPPs) constraints. The operation of TPPs produces various types of wastes, e.g. administrative and operational wastes such (transportation, motion, waiting, inventory, over processes, over production, and defect), that affect the efficiency of production that affect the environment and reduces production level. Previous studies have often focused on environmental waste in TPPs. Current research focuses on the identification of administrative and operational waste and the mechanism for eliminating the source of these wastes to achieve higher production level. Therefore, this research aims to develop Multi-Assessment Model to Explore Workplace Wastes, Source of Wastes, and for Selecting Appropriate LMPs in TPPs.To achieve that, this research applies a multi-assessment model assessment method which involves the integration of the three main methodologies i.e. Qualitative, Quantitative and an Analytic Hierarchy Process (AHP) by conducting a mathematical connection between these three methodologies to the determination of waste in TPPs and identify the most important LMPs in TPPs. A case study was conducted to establish the effectiveness and validation of the proposed assessment in Jordan where it suffers from multiple problems in the energy sector. Our study finds that there is a clear difference in the types of waste in the TPPs according to different processes and that there is a difference in the weight of the effects of the LMPs according to the operational weight, financial, quality and quantity of waste. This research contributes to developing proposals to improve the method for selection of appropriate LMPs within a TPPs. Keywords: Thermal Power Plant, Types of Waste Assessment, Waste Sources Assessment, Lean Manufacturing Practices Assessment. 2020 The Authors. Production and hosting by Crown Academic Publishing (CAP) on behalf of International Journal of Multidisciplinary Sciences and Advanced Technology (IJMSAT). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc- nd/4.0/). Contents lists available at Crown Academic Publishing International Journal of Engineering and Artificial Intelligence Journal home page: http://www.ijeai.com Original article